I know what you are saying but this does guarantee that people will use their rules books. By using them they are also reading them. I did not do as well as in the years past as I got in a hurry and did not pay attention to wording. My bad. I do feel this is the way to go at least in part. There will never be a way to stop bad umpires from working so at least make sure they have read the book to take a test.
I feel or at least it was intimated, that the unlimited time will eventually go away. When you do something for the first time there has to be allowances made. The current format allows for ease of grading, instantaneous results and reading the book.